5/8/2023 0 Comments Macvim color scheme![]() I call such function satisfying this a degradation. A function from hex triplets onto valid triplets now must be applied, which must be an identical function when restricted to the set of valid triplets. These 256 numbers, I say, are valid hex triplets. Nevertheless, iTerm2 (as well as Mac’s native Terminal.app in recent years) can only display 256 hex triplets. We set their values to be hex triplets, specifying the assignation. with set termguicolors), I call this a direct assignation. Meanwhile, in a terminal, I say that each of the 16 syntax group are assigned a hex triplet. If opened in a graphical user interface (GUI), for example gVim or MacVim, all hex triplets are able to be displayed, and we are done. If a set of displayed physical colors is significantly different from the physical colors envisioned by the creator, they are said to be displayed incorrectly. I call such map from hex triplets to physical colors to be a display. vim.Īnd furthermore, I say, a hex triplet is shown as a physical color on a computer monitor for example, #ffff00 is shown as a yellow color on the monitor. A realization is specified by a color scheme file with extension. Then, I say, a function from syntax groups to hex triplets is a color realization. In other words, the set consisting of all hex-triplet-represented color is a universal set. For our purpose, all relevant colors may be described in terms of a hex triplet for example, #ffff00 stands for yellow. Following above example, new is colored bright yellow in Vim’s “default” color scheme, but grass-green in “Solarized”. How it is colored, however, depends on the color scheme. In particular, I say that an item is trivially recognized, if it is mapped to the Normal group, i.e., being ignored. cpp file the string new belongs to the syntax group “Statement”. A function from syntax items to syntax groups is said a syntax recognition. For further information, see :h syntax.Īfterwards, several syntax items are classified into one of the 16 possible syntax groups, all or which is intended to be colored the same. Vim’s syntax files are responsible for parsing. For instance, new is picked out as a c++ keyword that instructs the operating system to find a memory block of a certain size for sake of holding variables, and to report its address. Text are then separated as syntax items, which are strings that match a certain pre-defined pattern. In Vim, plain text, I say, is parsed with rules according to its file extension. ![]() I will focus only on Vim opened in the terminal emulator iTerm2, rather than GUI version of Vim, for example gVim or MacVim. ![]() This note first explains the basic idea of syntax highlighting in Vim, then describes my experience with several popular color schemes, reminds the reader several caveats, and points out the moral of the story.
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